Tyrian purple on grayscale



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Description 6,6'-dibromoindigo (the main component of Tyrian purple) photographed against 18% gray card and color control patches from my antique color dataguide.
Date 2007-07-17 (original upload date)
Source Originally from en.wikipedia; description page is/was here.
Author Original uploader was Brochis at en.wikipedia
(Reusing this file)

Released into the public domain (by the author).


PD-icon.svg This work has been released into the public domain by its author, Brochis at the wikipedia project. This applies worldwide.

In case this is not legally possible:
Brochis grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

Original upload log

(All user names refer to en.wikipedia)

  • 2007-07-17 04:44 Brochis 1688×1348×8 (248864 bytes) 6,6'-dibromoindigo (the main component of Tyrian purple) photographed against 18% gray card and color control patches from my antique Kodak color dataguide.

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EXIF data:
File name tyrian_purple_on_grayscale.jpg
Size, Mbytes 0.237057617188
Mime type image/jpeg
Camera manufacturer NIKON
Camera model COOLPIX L4
Image resolution in width direction 300
Image resolution in height direction 300
Unit of X and Y resolution 2
Exposure time 1/60 sec (0.0166666666667)
F number f / 3.9
Exposure program 2
ISO speed rating 50
Compressed bits per pixel 2
Exif version 0220
Lens focal length 13.2 mm
Date and time original image was generated 2007:07:16 21:38:32
Date and time image was made digital data 2007:07:16 21:38:32
Meaning of each component 
Aperture 3.92694824509
Exposure bias 0
Maximum lens aperture 2.97085365854
Metering mode 5
Supported Flashpix version 0100
Color space information 65535
Exif image width 1688
Exif image length 1348
InteroperabilityOffset 1508
Sensing method 2
Scene type 
Digital zoom ratio 0
Focal length in 35 mm film 77 mm
Interoperability index R98
Interoperability version 0100
Unique image ID 41f91dcb8a00adc9ff0c05d99f4c471d
Software used Picasa 3.0
Copyright holder Copyright 2006
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